k = 1/9 can't possibly be right. That's what you'd get if the LHS's were equal, but they're not. Can you show your work?

Weight is the gravitational force acting on a mass, so it is a force. As to deriving the W = mg equation from the gravitational force equation, just set F = W, and combine the two equations in post # 8.

k = 1/9 can't possibly be right. That's what you'd get if the LHS's were equal, but they're not. Can you show your work?

Weight is the gravitational force acting on a mass, so it is a force. As to deriving the W = mg equation from the gravitational force equation, just set F = W, and combine the two equations in post # 8.

I get something different now. [LaTeX ERROR:
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so M'=13/630M